** Viva Energy VEA.AX rises as much as 8.6% to A$2.64, highest since January 30
** Retail convenience and fuel network operator welcomes Australia government's decision to support domestic oil refining
** Australia raises Fuel Security Services Payment Margin Marker cap and collar to 10 AU cents/litre from 6.4 AU cents/litre for its Geelong Refinery in Australia
** FSSP hike to help refiners bolster financial stability, cushion volatility in refining margins
** YTD, VEA up 19.5%
(Reporting by Aamir Sheik Khalid in Bengaluru)
((Aamir.SheikKhalid@thomsonreuters.com))